Piston packing-ring.



T 0 all whom. it may concern Be it known that T, Eocene Sonsnson, a citizen of the United States, residing at Whitehall, in the county of Trempealeau and State of Wisconsin, has invented a certain new and useful Piston Packing-Bing, of which'the following is aspeciiication.

The present invention appertains to packmg rings for the pistons of internal combustion engines, pumps, and the like, and aims to provide a novel and improved metallic packing ring.

This invention contemplates the provision of a packing ring of unique construction, whereby it will be thoroughly efficient and practical in use, the packing ring being expansible uniformly throughout its circumterence, and being so constructed as to prevent leakage or escape of the fluid acting against or bein acted upon by the piston.

It is also wit in the scope of the invention, to provide a packin ring of simple and inexpensive construction, which may be readily manufactured and applied within the usual annular groove of a piston, which may readily expand and contract to accommodate itself to the walls of the cylinder, and which will provide a fluid-tight packin between the piston and the cylinder.

ith the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, can be made within the scope of what is claimed, without departing from the spirit of the invention.

The invention is illustrated in its preferred embodiment in the accompanying drawing, wherein Figure 1 is a plan view of the improved packing ring. Fig. 2 is a sectional view of the device taken on the line AB of Fig. 1. Fig. 3'is a perspective view of the packing ring.

in carrying out the present invention, the packing ring comprises two annular metal lic sections a and 5, which are of like ex ternal and internal diameter, and which contact facially. Each of the sections is split or divided and has its ends provided with inner and outer overlapping fingers d and a, respectively, which provide a scarf :ticn of. Letters Eatent.

hppEtcatlon-Qled may 2%, E91 3.

Patented Feb. 2, 915..

serial no. seiner joint for the ends of the annular section. The split portions or scarf joints are spaced or arranged diametrically opposite each other, and the intermediate portion of each section opposite the ends thereof is relatively thick and the section decreases in thickness from the intermediate portion to the ends thereof. Thus, the contacting faces of the two sections will lie in a plane arranged obliquely relative to the planes of the remote faces of the sections.

The intermediate or thickest portion of the annular section b, is provided with a lug or stud c projecting from its inner fiice and adjacent its inner edge, so as to project between the scarf ends of the section a.

he lug c is arranged adjacent the inner edges of the annular sections, so as not to interferewith the outer portion of the scarf joint of the section a, it being the function of the lug 0 to hold the annular section a and 6 against rotator 'movement relative to one another, which i it occurred, would be liable to cause the packing ring to bind within the annular groove of the piston (not shown).

To apply the packing ring to a piston, the annular sections may be readily expanded over the piston and then sprung properly into the usual annular groove provided for the packing ring. The sections of the pack ing ring are normally under tension so as to expand snugly against the walls of the cylinder, it being noted that the annular sections in being thickest at their intermediate portions and growing thinner from the intermediate portions to the ends, will cause the annular sections to expand uniformly throughout their lengths. more, the annular sections are thinnest at the scar-i joints, to reduce to a minimum, the liability of leakage, whereas the sections are thickest adjacent the opposite scarf joints, to provide a relatively thick solid portion cooperating with each scarf joint to provide a suitable bearing for contact with the inner walls of the cylinder. It is evident that each of the scarf joints being in facial contact with the opposite section, will .cause the gaps between the ends of the sec tions, to be closed by the opposite sections, and the packing ring may therefore expand without danger of leakage. The lug c in projecting between the scarf ends of the section a will lock the two sections against Furtherrelative rotary -movement', and' this-"will avoid the liability of the packing ring to bind within the groove of the piston.

From the foregoing, taken'in connection with the drawing, the advantages and capabilities of the present device will be obvious to: those versed .in j the art, it is thought, without further comment being deemed necessary.

I 0 arm:

A packing ring embodying two annular sections of like diameter contacting facially and having 0 posite split portions, the ends provided by t e split portions being scar-fed, the intermediate portion of each. section 0 "posite the ends thereof being relative y contest? this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

thick and the section "decreasing in thick ness from the intermediate portion to the ends thereof, whereb the contacting faces of the sections will he in a plane arranged obliquely relative to the, planes of the remote faces of the sections, the intermediate ortion of one section havin a lug project mg between the scarfed en of the other section. b

In testimony whereof I afiix my signature in the presence of two witnesses.

EUGENE A. soimnson.

Witnesses:

SIGWALD N. -Hneon, ELSIE M. Woon.

Washington, D. c." 

